Prompt
Should I use PostgreSQL over MySQL for a greenfield app?
Latest observation
Oct 7, 2026
OpenAI APIWeb search: off
Usually yes, PostgreSQL is the safer default for a new greenfield app.
Why PostgreSQL is often the better default
- Stronger SQL features: better support for advanced querying, CTEs, window functions, JSONB, full-text search, constraints, and indexing options.
- Better data integrity: tends to encourage more rigorous schema design.
- Great extensibility: useful if your app grows into more complex reporting, analytics, or search needs.
- Excellent ecosystem: widely supported by frameworks, cloud providers, and tooling.
When MySQL might be the better choice
Choose MySQL if:
- Your team already knows it well.
- Your hosting/provider or stack is optimized around it.
- You’re building a fairly simple CRUD app and want to minimize complexity.
- You’re working in an environment where MySQL compatibility is required.
Practical rule of thumb
- Need flexibility, correctness, and long-term room to grow? Pick PostgreSQL.
- Need maximum familiarity or existing operational alignment? Pick MySQL.
My recommendation
If you don’t have a strong reason to choose MySQL, go with PostgreSQL.
If you want, I can also give you a decision matrix based on your app type (SaaS, e-commerce, analytics, mobile backend, etc.).
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